Topography and ultrasonographic identification of the equine pulmonary vein draining pattern.
Authors: Vandecasteele T, van Loon G, Vandevelde K, De Pauw B, Simoens P, Cornillie P
Journal: Veterinary journal (London, England : 1997)
Summary
Pulmonary vein assessment via echocardiography remains underutilised in equine practice, largely because detailed anatomical mapping of these vessels and their drainage patterns has been lacking until now. Using anatomical dissection and silicone casting techniques on equine cardiopulmonary specimens, Vandecasteele and colleagues systematically mapped how each lung lobe drains into collecting antral chambers before converging at distinct ostia (openings) into the left atrium, then determined whether these ostia could be reliably identified ultrasonographically in standing horses. Three of the four ostia proved consistently identifiable on echocardiography; notably, the ostium draining the caudal lung regions showed minimal anatomical variability between individuals, whilst the ostium draining the remainder of the right lung occupied a highly recognisable position adjacent to the interatrial septum, making it a reliable landmark. These findings establish a practical framework for practitioners to incorporate pulmonary vein assessment into cardiovascular examinations, opening possibilities for evaluating vessel diameter and blood flow characteristics—parameters that may prove diagnostically valuable in detecting structural or functional cardiac pathology. For vets performing cardiac ultrasound, farriers monitoring performance horses, and physiotherapists assessing circulatory compromise, the ability to systematically visualise and evaluate pulmonary vein ostia represents a refinement of non-invasive diagnostic capability with implications for earlier detection of cardiovascular disease.
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Practical Takeaways
- •Practitioners can now use ultrasound to visualize pulmonary vein ostia in standing horses, providing new diagnostic capability for cardiac assessment
- •The right lung ostium adjacent to the interatrial septum serves as a reliable anatomical landmark for consistent sonographic identification
- •Standardized identification of pulmonary vein ostia may improve detection of cardiovascular pathology through measurement of vessel size and blood flow characteristics
Key Findings
- •Three of four pulmonary vein ostia could be identified echocardiographically in standing horses
- •The ostium draining the caudal lung regions showed minimal anatomical variability between individuals
- •The ostium draining the remainder of the right lung is easily recognizable as a landmark adjacent to the interatrial septum
- •Ultrasound identification of pulmonary vein ostia enables assessment of size and flow patterns for cardiovascular disease evaluation